Grinding attachment for lathes.



No. 727,129. PATElI'lED MAY 5, 1903.

A. R. GREVER &: G. STONE.

GRINDING ATTACHMENT FOB. LATHES.

APPLICATION FILED MAY 31, 1902.

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No. 727,129. PATBNTED MAY '5, 1903.

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GRINDING ATTACHMENT FOR LA-THES. APPLICATION FILED MAY 31, 1902.

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UNITED STATES PATENT Patented May 5, 1903.

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ALBERT R. GREVER, OF PENSAUKEN, NEWVJERSEY, AND CLARENCE STONE, OFPHILADELPHIA, PENNSYLVANIA.

GRINDING ATTACHMENT FOR LATHES.

SPECIFICATION forming part Of Letters Patent NO. 727,129, dated May 5,1903.

Application filed May 31,1902. Serial No. 109,643. (N0 model.) I

To all whom it may concern:

Be it known that we, ALBERT R. GREVER, residing at Pensauken, in thecounty of Camden and State of New Jersey, and CLARENCE STONE, residingat Philadelphia, in the county of Philadelphia and State ofPennsylvania, citizens of the United States, have invented certain newand useful Improvements in Grinding Attachments for Lathes, of which thefollowing is a specification.

This invention relates to grinding attachments for lathes, and has forits object to provide, first, an adjustable attachment which may bereadily applied to lathes of varying sizes; second, an attachment havinga driving mechanism which will always positively drive thegrinding-wheel and at the same time permit the latter,with itscomplementary parts, to be moved with the lathe-carriage transverselyand longitudinally of the lathe in a manner to grind various kinds ofwork; third, an attachment having an angular adjustment to meet thevarious requirements, including the grinding of the lathe-centers.

With this object in view the invention consists in the novelconstruction and combina tions of parts, which will be hereinafter fullydescribed and claimed.

In the drawings, Figure 1 is a plan view of our improved attachment asapplied to a-lathe. Fig. 2 is a side elevation thereof. Fig. 3 is a planview, partly in section, of the frame carrying the grinding-wheel andadjuncts. Fig. at is a sectional detail of one of the pulleystands. Fig.5 is a sectional plan 'of one of the pulley-stands. Fig. 6 is anendelevation of one of the pulley-stands as applied to the lathe.

1 designates the main frame, 2 the toolcarriage, 3 the driving-pulleys,and 4 the centers, of a well-known type of lathe, the tool-carriagebeing movable transversely and longitudinally of the machine in theusual manner. 7

Our grinding attachment in its preferred form is of the followingconstruction: I

5 is a frame provided with bearings 6, in which isjournaled a shaft 7,which is provided at one end with a grinding-wheel 8 and at the oppositeend with a knob 9, by means of which the shaft may be moved back andforth passing through a slot.- in said bracket.

'24:, arranged on the frame 5.

through its bearings, as desired. Spli-ned on the shaft 7 is a pulley10, which is arranged between the bearings 6, thereby permitting thelongitudinal movement of the shaft without altering the position of thepulley.

11 is a bracket, which is adapted to be rigidly secured to thetool-carriage by a bolt 12 Rising from this bracket is a post 13, towhich is fitted a collar 14, so as to be vertically adjustable thereon,a set-screw 15 being provided for that purpose. The collar 14 carriesthe frame 5, the latter being provided with a boss 16, which is fittedto the collar 14. so as to be circularly adjustable about said collar.The boss 16 rests upon a flange 17 on the collar and is provided with aset=5crew 18, by means of which the frame may be secured in its variouspositions of adjustment. This construction permits the frame 5 to beadjusted so as to vary the angular position of the grinding-wheel inrespect to the center line of the lathe, and thereby meet the variousrequirements of the Work to be groundsuch, for example, as grinding thelathe-centers 4.

The shaft 7 is driven by a belt 19, arranged longitudinally of themachine and passing from one of the driving-pulleys to and around thepulleys 2O 21 of a pair of pulley-stands 22 23, respectively, which areadapted to be secured to the lathe near the respective ends thereof,said belt being directed to and around the pulley 10 on the shaft 7 byapair of pulleys The pulleystands 22 23 each comprise a pair ofclampingjaws25, held togetherby screws 26, and a vertical post 27,arranged on. the upper jaw. Fitted to the posts 27 are frames 28 28" ,onwhich are mounted the pulleys 2021'; respectively. The frames 28 28 areprovided with set-screws 29, by means of which they'may be'ad'justedvertically on the posts 27. The pulleys 20 on the stand 22 are arrangedin pairs and at right angles to each other, so' as to guide 'the belt 19to and from the pulley 21 on the stand 23 and to and from thedriving-pulleys 3 of the lathe.

As the grinding-wheel 8 is moved longitudinally of the machine with thetool-carriage, the belt 19 passes around thepulleys 24 an 10 withoutinterfering with the action of the grinding-wheel.

In order to maintain the belt 19 taut and to permit the grinding-wheel 8to be adjusted transversely of the machine with the carriage 2, we mountthe pulley 21 on the frame 28 of the stand 23, so as to have a yieldingconnection therewiththat is to say, the pulley is mounted on a stem 30,which is slidingly fitted to the frame 28, and is held normallyretracted by the action of a spring 31, interposed between said frameand a collar 32 on the stem 30.

By the above-described construction it will be seen that thegrinding-wheel can be adjusted at will to any angle or longitudinally ortransversely of the machine without interfering in any Way with itsdriving mechanism.

We claim 1. The combination with the tool-carriage of a lathe, a bracketadapted to be secured thereto, a post on said bracket, a frameadjustably mounted on said post, a shaft journaled in said frame, agrinding-wheel on said shaft, and means for actuating said shaft.

2. The combination with the tool-carriage of a lathe, of a bracketadapted to to be secured thereto, a post on said bracket, a collar onsaid post, means for adjusting said collar vertically on said post, aframe on said collar, a shaft journaled in said frame, a grindingwheelon said shaft, means for actuating said shaft, and means for adjustingsaid frame circularly about said collar whereby the angle of the shaftmay be varied. I

3. The combination with the tool-carriage of a lathe, of a belt, meansfor supporting and guiding said belt longitudinally of the lathe, meansfor driving said belt, a frame secured to the tool-carriage, a shaft insaid frame, a grinding-wheel on said shaft, a pulle'y on said shaft, andmeans for directing said belt to and. around said pulley.

4a. The combination with the frame and tool-carriage of a lathe, of aframe adapted to be secured to the tool-carriage a shaft journaled insaid frame, a grinding-wheel on said shaft, a pulley on said shaft,apairof pulleystands adapted to be mounted on the latheframe near therespective ends thereof, pulleys on said stands, a belt passing aroundsaid pulleys and extending between said stands, means for driving saidbelt, and means for directing said belt to and around the firstnamedpulley.

5. The combination with the frame and tool-carriage of a lathe, of aframe adapted-to be mounted on the tool-carriage, a shaft journaled insaid frame, a grinding-wheel on said shaft, a pulley on said shaft, apulley-stand provided with pulleys and adapted to besecured to thelathe, as'econd pulley-stand having a pulley mounted thereon so as tohave a yielding connection therewith, a belt passing around all of saidpulleys, means for driving said belt, and means for directing said beltto and around the first-named pulley.

6. The combination with a lathe, of a bracket adapted to be secured tothe tool-oarriage thereof, a frame adj ustably mounted on said bracket,a shaft journaled in said'frame, a grinding-wheel on said shaft, a pairof pulley-stands, adjustable frames thereon, pulleys on said adjustableframes, abelt passing around said pulleys and extending between saidstands, means for driving said belt, and me'ansfor directing said beltto and around the first-named pulley.

In testimony whereof we affix our signatures in presence of twowitnesses.

ALBERT R. GREVER. CLARENCE STONE.

\Vitnesses:

RALPH H. GAMBLE, ANDREW V. GROUPE.

